/*
 * Copyright (c) Huawei Technologies Co., Ltd. 2025. All rights reserved.
 * You can use this software according to the terms and conditions of the Mulan PSL v2.
 * You may obtain a copy of Mulan PSL v2 at:
 *          http://license.coscl.org.cn/MulanPSL2
 * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
 * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
 * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
 * See the Mulan PSL v2 for more details.
 */
#include "CheckpointBarrier.h"

#include <stdexcept>
#include <sstream>

// Constructor
CheckpointBarrier::CheckpointBarrier(long id, long timestamp,
                                     CheckpointOptions *checkpointOptions)
    : id_(id), timestamp_(timestamp), checkpointOptions_(checkpointOptions)
{
    if (checkpointOptions == nullptr) {
        throw std::invalid_argument("checkpointOptions must not be null");
    }
}

CheckpointBarrier::~CheckpointBarrier()
{
}

CheckpointOptions *CheckpointBarrier::GetCheckpointOptions() const
{
    return checkpointOptions_;
}

CheckpointBarrier *CheckpointBarrier::WithOptions(
    CheckpointOptions *checkpointOptions)
{
    return this->checkpointOptions_ == checkpointOptions
               ? this
               : new CheckpointBarrier(id_, timestamp_, checkpointOptions);
}

bool CheckpointBarrier::operator==(const CheckpointBarrier &other) const
{
    return id_ == other.id_ && timestamp_ == other.timestamp_ &&
           *checkpointOptions_ == *other.checkpointOptions_;
}

long CheckpointBarrier::GetId() const { return id_; }

long CheckpointBarrier::GetTimestamp() const { return timestamp_; }

bool CheckpointBarrier::IsCheckpoint() const
{
    return !(checkpointOptions_->GetCheckpointType()->IsSavepoint());
}

CheckpointBarrier *CheckpointBarrier::AsUnaligned()
{
    return checkpointOptions_->IsUnalignedCheckpoint()
               ? this
               : new CheckpointBarrier(
                     GetId(), GetTimestamp(),
                     GetCheckpointOptions()->ToUnaligned());
}

std::string CheckpointBarrier::ToString() const
{
    std::ostringstream oss;
    oss << "CheckpointBarrier " << id_ << " @ " << timestamp_
        << " Options: " << checkpointOptions_->ToString();
    return oss.str();
}

namespace std {
    std::size_t hash<CheckpointBarrier>::operator()(const CheckpointBarrier &ref) const
    {
        return static_cast<std::size_t>(
            (static_cast<std::uint64_t>(ref.GetId()) ^ (static_cast<std::uint64_t>(ref.GetId()) >> 32) ^
             static_cast<std::uint64_t>(ref.GetTimestamp()) ^ (static_cast<std::uint64_t>(ref.GetTimestamp()) >> 32))
        );
    }
}
